Explanation:
A risk fallback plan is a proper plan devised to identify definite action to be taken if the risk action plan (Risk Mitigation Plan) is not helpful. Fallback plan is important in Risk Response Planning. If the contingency plan for a risk is not successful, then the project team implements the fallback plan. Fall-back planning is intended for a known and specific activity that may perhaps fail to produce desired outcome. It is related with technical procedures and with the responsibility of the technical lead.
Incorrect Answers: A, C, D: These all choices itself comes under risk action plan. As in the described scenario, risk action plan is not turned to be effective, these should not be implemented again.